Preheating device.



e. VAN DAAM.

. PREHEATING DEVICE.

APPLICATION FILED MAR. 27. 1914- I Patentedfiept. 28; 1915."

WITNESSES M m M By W ATTORNEY.

Y citizen of GERRIT VAN DAAM, OF BUFFALO, NEW

YORK.

PREHEATING DEVICE.

M I Specification of Letters Patent.

; Application filed March 27, 1914. Serial N 0. 827,659.

To all whom it may concern Be it known that I, GERRIT VAN DAAM, a theUnited States, residing at Bufalo, in the county of Erie, State of Nework, ave invented a new and useful Preheating Device,.of which thefollowing is a specification.

Iy invention relates to improvements in delivering pre-heated air to thecombustion chambers of hot air heaters and hot water ,heaters and thelike.

1 a view in part section the pro-heating element.

- he object is to provide extremely simple and durable means forinsuringa constant supply of highly heated fresh air to the combustion chamberat a point above the fuel bed. where the gases arising therefrom andwhich have a tendency toescape may be commingled therewith and theircomplete combustion insured.

of example, a suitable embodiment of my invent1on-Figure 1 is and partelevation of Fig. 2 is a perspective View, parts broken away, of asectional boiler showing the "application of a plurality of suchpro-heating elements thereto.'

1g. 3 is a part elevation and part sectional view of a small waterheater showing a pair of said preeheating elements applied thereto; Fig.4-is an elevation, part broken away, of a usual domestic hot air furnacewith a pair of said pro-heating elements applied I thereto. I Similarnumerals refer to throughout the several views.

he heating element 6 is an integral struc-' ture made-by the processknown as cored casting, that is, it is made in a Without plates orbolts, which tend to become distorted when subjected to hot temsimilarparts peratures' This structure 6 is so cast as to e provided with avertically extendin c annel the nozzle 8 sions such from the singlepiece topof the heat- Ih grate 21. TI lements 6 are supported by theconductor pipes 15 which in turn are supported by the branches connectedtherewitlrwhich rest upon the interior walls" ormmg partitions betweenflues and water compartments of the hot water furnaces as in I igs.2and3, ort

e supported by the single cross pipe 18 passing entirely through the hotair furnace as in Fig. 4, connected with the two downwardly extendingintake P1136519.

any required distance above the fuel bed dependin upon the nature of thefurnace and of the results desired to be gained. For example in the hotclose to the fuel air furnace it may be desirable to have the heatingelements elevated somewhat from the fuel bed.

- he advantage of outside of the f eference tion Serial No. 827,658,filed March 27, 1914, which arrangement similar to that shown anddescribed herein.

What I claim isz- '1. In combination with. a combustion chamber of afurnace, an air heating'ele hese elements may hang and Patented Sept.28,1915.

having the fresh air an air conductor pro ectmg into the conductor, saidthe and having a tion chamber and connection with the air elementprovided with .a channel in line with said depending conductor extensionand leading directly therefrom to the bottom of the element, an tortuouschannels communicating with said first mentioned channel'and leadingtherefrom to the air discharge. v

'2. In combination :with a combustion chamber of a furnace, an airheating element, an air conductor leading from a point outside thefurnace level of the leading into the furnace at a point above the fuelbed supported directly at a pluralityof points by the walls of thefurnace depending extension with an intake belowfuel bed, said conductordeliverv ing to and suspending the air heating element, said air heatingelement consisting of an integral cored casting having connection at itstop with the air conductor and provided with a channel in line with saiddepending conductor extension and leading directly therefrom to thebottom of saidelement, and tortuous channels leading from said channelto distributing chambers at t 10 top of said element said chambers pro-,

vided with air vents discharging into the combustion chamber of thefurnace. J

. GER-BIT VAN D'AAM;

Witnesses MAE HOFMANN, RALPH H. GAMBLE.

